AS3604

AS3604 Preliminary Product Brief and AS3603/04 Delta Sheet, Confidential a ustria micro systems Preliminary Product Brief and AS3603/04 Delta Sheet, Confidential AS3604 AS3603 with Momentary Power Loss Detection, synchronous DCDC and increased driving capability of the LDOs General Description The AS3604 is based on the architecture of the AS3603. It has additional functions like momentary power loss detection, a synchronous DCDC buck converter, charger resume operation and increased driving capability of the LDOs. − − − − − − Programmable Constant Voltage Charging Programmable Pulse Charging Safety Functions (Low Battery Shutdown) Operation without Battery No-Battery Detection Can regulate the current through the battery or from the charger − Charger Input Overvoltage protection (6V) − Shutdown even with connected charger − Charger Resume operation − Charger Interrupts (Inserted, Removed, Overvoltage, Resume) Four 8-Bit Programmable Current Sources (0.625mA to 160mA) support: − Buzzer − Vibrator − LEDs Wide Battery Supply Range 3.0 to 5.5V Four General Purpose Switches (1 and 2 ) Three Programmable General Purpose I/O Pins On-Chip Bandgap Tuning for High Accuracy (±1%) Integrated Programmable Watchdog (7.5 to 1900ms) Programmable Reset (10 to 110ms) Shutdown Current typ 7µA (2.5V Always On) Overcurrent and Thermal Protection 0.35µ CMOS Solution 48-Pin, 6x6mm QFN Package (0.4mm pitch) 2.1 Watt Power Dissipation @ TAMBIENT = 70ºC Almost Pin Compatible to AS3603 (only one pin changed) Key Features The AS3604 features all the functions of the AS3603 with the following additions (marked with boldface italcs): Momentary Power Loss Detection − Detect a short interruption (=4 LS3 C21 >=100 F C23 100nF IN_L C25 100nF AIN_R IN_R C24 100nF AOUT_R AS3604 Power Management Unit Analog LDO Low Noise 1.85-3.4V 200mA =100 F C23 100nF IN_L C25 100nF AIN_R IN_R C24 100nF AOUT_R AS3604 Power Management Unit Analog LDO Low Noise 1.85-3.4V 150mA RF LDO Low Noise 1.85-3.4V 150mA VANA_2 AIN_L AGND 1W Audio Amplifier RF LDO Low Noise 1.85-3.4V 150mA RF LDO Low Noise 1.85-3.4V 200mA (